Patents by Inventor John Larson Owen

John Larson Owen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing an aqueous solution comprising ferric chloride
    Patent number: 5935545
    Abstract: The present invention provides a process for preparing an aqueous solution of FeCl.sub.3. The process involves the steps of: (a) reacting an ore material comprising titanium and iron with chlorine and coke to form a metal chloride vapor stream comprising titanium tetrachloride, ferrous chloride, ferric chloride and unreacted coke and ore solids; (b) cooling the metal chloride vapor stream to a temperature in the range of 350 to 500.degree. C. to condense at least some of the ferrous chloride; (c) separating the condensed ferrous chloride and the unreacted coke and ore solids from the metal chloride vapor stream; (d) cooling the metal chloride vapor stream to a temperature in the range of 180 to 240.degree. C. to form a precipitate comprising ferric chloride; and (e) adding the precipitate to water to form an aqueous solution comprising ferric chloride. The resulting aqueous solution has a high FeCl.sub.3 content, and can be used in wastewater treatment applications.
    Type: Grant
    Filed: July 11, 1997
    Date of Patent: August 10, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Kevin J. Leary, Juergen Kurt Plischke, John Larson Owen, John Robert Stecher